• Caltex® founded as a joint venture of Standard Oil of California.
• Marketed first compounded diesel engine oil (RPM Diesel Engine Lubricating Oil) making high-speed diesel engines feasible.

First in the world to develop compound diesel engine oil that could be used in any diesel engine adopted by the US Navy. Delo® becomes a registered trademark.

First in the world to develop a successful multi-grade engine oil.

First in the world to develop an ashless detergent 2-cycle diesel engine oil.

First grease capable of extending lubrication intervals of heavy-duty equipment to 20,000 miles.

First borate base “ultra” extreme pressure gear lubricant for industrial and automotive applications.

First low-wear tractor hydraulic fluid with satisfactory wet brake performance in Ford/Massey/Fergus on bronze brakes and John Deere paper composite brakes.

First to document million-mile, no overhaul engine life in Caterpillar 3406B.

Launch of Delo® Gear ESI & Delo® Trans ESI – first extended drain non-synthetic axle and transmission oils.

Delo® ELC technology is the first extended life coolant technology launched and approved as factory fill at Caterpillar under Cat EC-1 specification.

Documents the first million-mile, no overhaul engine life for the three major U.S. engine manufacturers and is first to meet the performance levels of PC-7 (CH-4).

Recognized for outstanding performance, Chevron® Delo® products have been honored by Lubricant Lubricants World magazine in 1999, 2000 and 2001 because these products “are poised to contribute greatly to the achievement and enrichment of the lubricants industry”.

Delo® products meet the API CI-4 Plus standard before official licensing.

Delo’s Extended Life Coolant formulation is the first to deliver 750,000 miles of service life with no Extender required, and also reached first 1,000,000 mile life in heavy duty trucks with the addition of an extender.

Chevron® launches Delo® Grease ESI which provides extended service protection to 30,000 miles.

Chevron® receives SAE research award for “Extending the Boundaries of Diesel Particulate Filter Maintenance with Ultra-Low Ash – Zero Phosphorus Oil.”

Launched Delo® 400 MGX SAE 15W-40 – the first low emission oil (API CJ-4) formulated to protect diesel engines using up to 2000ppm diesel fuel Sulphur levels.

Delo® Grease ESI is first grease to document 50,000 mile re-greasing intervals on over the road trucks for wheel bearings, chassis, U-Joints and fifth wheels.

Delo® 400 XLE SAE 15W-40 is the first North American SAE 15W-40 diesel engine oil to achieve both API CK-4 and European ACEA E6 long oil drain performance; and it also achieved the first Daimler MB228.51 approval at this viscosity grade in North America.

Delo® 400 LE Synthetic SAE 5W-30 becomes first SAE 5W-30 diesel engine oil to achieve 100,000 mile oil drain interval with NO oil filter change in Detroit Diesel DD15 diesel engines.

Chevron® Delo® 400 (API CK-4 and API FA-4 products) is the first product line to be fully formulated using new low phosphorus advanced additive chemistry in the industry.

Introduction of Delo® 600 ADF with Ultra Low Ash HDMO and OMNIMAX technology.

Caltex Delo® has been introduced as a premium heavy-duty diesel engine oil in partnership with HPCL in India.